Trend Micro Internet Security 2008 (PC-Cillin) is an anti-virus cum anti-spyware software available for the Windows XP and Vista.
The software also includes a NetNanny like web filter to help you block websites that you think may be inappropriate for children.
Trend Micro just launched v. 2009 of their Internet Security suite but if you don’t need all the new features, here’s a chance to grab the previous version of Trend Micro Internet Security suite for free.
Just download the trial version of Trend PC-cillin software and use the following serial number to convert your trial into a full retail version.
PFEP-9991-7436-4997-1545
This is perfectly legit offer and is part of a promotion between Trend Micro and residential Internet customers of HTC ISP.
*In case the offer expires by the time you read this post, check this list of free anti virus software. Thanks Fatwallet.
Find this article at: http://www.labnol.org/software/download-trend-micro-free-antivirus-software/5201/

Reader Comments
Tried to install but at the end it says. Serial Key is incorrect.
Written by Keshava on 11.04.08
Its nice. Now a days free antivirus is a wonderful thing for most of the people. It is very helpful for the People who are addicted to internet like me.
One question Amith, my question is that how long they provide free updates for us? Because having antivirus is not enough, isn’t it?
Written by kishore on 11.04.08
Its legit for people using HTC ISP but not for everyone. So, I dont think that you should publish this openly like that.
Written by Akshay Jain on 11.04.08
Thanks Amit.
It worked for me. So no more worries till Sep 2011. That’s nice!
Written by Technology Blog on 11.04.08
Try AVG free version. It is THE best anvirus that is available for free.
Written by Madhukar Reddy Gurram on 11.05.08
AVG Free is a good one. But of late I have had some problems running it with Spywareblaster.
Avira AntiVir is another free good one as is Avast.
Written by Krishna on 11.07.08
The key did not work for me either.
Written by James on 11.08.08
Hi,
I Have a sevior problem in my lap. due to virus attact. It is tacking long time to open any page.
in my lap. i hav recycler,desktop,autorun,win32 viruses are present.
I had kaspersky 2009 trial version but it does,t work so,what to do???
Written by Lopa on 11.22.08